DOWNLOAD Sony CDX-GT24 / CDX-GT28 Service Manual ↓ Size: 4.05 MB | Pages: 36 in PDF or view online for FREE

Model
CDX-GT24 CDX-GT28
Pages
36
Size
4.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio
File
cdx-gt24-cdx-gt28.pdf
Date

Sony CDX-GT24 / CDX-GT28 Service Manual ▷ View online

CDX-GT24/GT28
2
NOTES  ON  CHIP  COMPONENT  REPLACEMENT
 •  Never reuse a disconnected chip component.
 •  Notice that the minus side of a tantalum capacitor may be 
damaged by heat.
TEST DISCS
Please use the following test discs for the check on the CD 
section.
 
YDES-18 (Part No. 3-702-101-01)
 
PATD-012 (Part No. 4-225-203-01)
SAFETY-RELATED  COMPONET  WARNING!
COMPONENTS  IDENTIFIED  BY  MARK  
0  OR  DOTTED  LINE  
WITH  MARK  
0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS 
 
WHOSE  PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  
MANUAL  OR  IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
NOTES  ON  HANDLING  THE OPTICAL  PICK-UP 
 
BLOCK  OR  BASE  UNIT
The laser diode in the optical pick-up block may suffer electrostat-
ic break-down because of the potential difference generated by the 
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also 
use the procedure in the printed matter which is included in the 
repair parts.
The fl exible board is easily damaged and should be handled with 
care.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused 
on the disc refl ective surface by the objective lens in the optical 
pickup block. Therefore, when checking the laser diode emission, 
observe from more than 30 cm away from the objective lens.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
If the optical pick-up block is defective, please replace the whole 
optical pick-up block.
Never turn the semi-fi xed resistor located at the side of optical 
pick-up block.
optical pick-up
semi-fixed resistor
This compact disc player is classifi ed as a CLASS 1 LASER 
 
 
 
 
 
product. The CLASS 1 LASER PRODUCT label is located on the 
exterior.
This label is located on the bottom of the chassis.
CDX-GT24/GT28
3
Type of disc
Label on the disc
CD-DA
MP3
WMA
UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 
the lead free mark due to their particular size)
 : LEAD  FREE  MARK
Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 
than ordinary solder.
 
Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.
 
Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 
the heated tip is applied for too long, so be careful!
• Strong 
viscosity
 
Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.
• 
Usable with ordinary solder
 
It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.
 •  CD Play back
You can play CD-DA (also containing CD TEXT) and CD-
R/CD-RW (MP3/WMA fi les).
CDX-GT24/GT28
4
1. 
SERVICING  NOTES
 ..............................................   5
2. GENERAL
 
Location of Controls .......................................................   6
 Connections 
....................................................................  
7
3. DISASSEMBLY
3-1.   Sub Panel Assy  ...............................................................   9
3-2.   CD Mechanism Block .....................................................   9
3-3.   Main Board .....................................................................   10
3-4. Servo 
Board 
....................................................................  10
3-5.  Chassis (T) Sub Assy ......................................................   11
3-6.  Roller Arm Assy ..............................................................   11
3-7. Chassis 
(OP) 
Assy 
...........................................................  12
3-8.  Chucking Arm Sub Assy .................................................   12
3-9. Sled 
Motor 
Assy 
..............................................................  13
3-10.  Optical Pick-up Section ..................................................   14
3-11. Optical Pick-up ...............................................................   14
TABLE  OF  CONTENTS
4. DIAGRAMS
4-1.  Block Diagram –Main Section– .....................................   15
4-2.  Block Diagram –Display Section– .................................   16
4-3.  Printed Wiring Board –Main Section– ............................   17
4-4.  Schematic Diagram –Main Section (1/3)– ......................   18
4-5.  Schematic Diagram –Main Section (2/3)– ......................   19
4-6.  Schematic Diagram –Main Section (3/3)– ......................   20
4-7.  Printed Wiring Boards –Key Section– ............................   21
4-8.  Schematic Diagram –Key Section– ................................   22
5. EXPLODED 
VIEWS
5-1. Main 
Section 
...................................................................  28
5-2.  Front Panel Section .........................................................   29
5-3.  CD Mechanism Section (MG-101L-188//Q) ..................   30
6. 
ELECTRICAL PARTS LIST ..............................   31
CDX-GT24/GT28
5
SECTION  1
SERVICE NOTE
EXTENSION  CABLE  AND  SERVICE  POSITION
When repairing or servicing this set, connect the jig (extension 
cable) as shown below.
•  Connect the MAIN board (CNP301) and the SERVO board 
(CN401) with the extension cable (Part No. J-2502-076-1).
NOTE FOR REPLACEMENT OF THE AUX JACK (J901)
To replace the AUX jack requires alignment.
1.  Insert the AUX jack into the KEY board.
2.  Place the KEY board on the front panel. 
3.  Solder the three terminals of the jack.
NOTE  FOR  REPLACEMENT  OF  THE  SERVO  BOARD
When repairing, the complete SERVO board (Part No. A-1552-
122-A) should be replaced since any parts in the SERVO board 
cannot be repaired.
NOTE  FOR  THE  15-PIN  CONNECTOR (CN901)
Do not use alcohol to clean the 15-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
SERVO BOARD
CN401
MAIN BOARD
CNP301
J-2502-076-1
KEY board
AUX jack
front panel
Page of 36
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Sony CDX-GT24 / CDX-GT28 Service Manual ▷ Download

  • DOWNLOAD Sony CDX-GT24 / CDX-GT28 Service Manual ↓ Size: 4.05 MB | Pages: 36 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CDX-GT24 / CDX-GT28 in PDF for free, which will help you to disassemble, recover, fix and repair Sony CDX-GT24 / CDX-GT28 Car Audio. Information contained in Sony CDX-GT24 / CDX-GT28 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.